2,3',5,5'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL,

Tadalafil, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 171596-29-5

Methoxychlor (13C12), 100µg/ml in Nonane, 1,2ml

Ethylene glycol mono(4-n-nonylphenyl) ether-13C6, 10µg/ml, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 1346600-52-9